Carbon concentrating mechanism

The aim of this Master of Engineering (MEng) - Aerospace thesis is to study the structural response and failure of aerospace grade composites during exposure to fire. Key aspects of the research are to analyse the thermal and mechanical responses of laminates and sandwich composites in high temperature and fire environments, which result in softening and structural failure. The research is concentrated on carbon/epoxy laminates and sandwich composites, which are the most common composite materials used in aerospace structures.

209p runthenight05 01-03-2023 6 2   Download

The rate constants and the activation energies of the reaction between carbon dioxide and 1,1,3,3-tetramethylguanidine (TMG) in 1-propanol solution were measured by a stopped-flow technique at a temperature range of 288–308 K and at a TMG concentration range of 2.5–10.0 wt %. Based on the pseudo-first-order reaction for CO2 , the reaction was modeled by a termolecular reaction mechanism, which resulted in a rate constant of 199.30 m 3 kmol −1 s −1 at 298 K. The activation energies were 5.19 kJ/mol and 5.26 kJ/mol at 2.5 and 5.0 wt % TMG, respectively.

12p langthannam 29-12-2021 8 0   Download

Cyclic voltammetry (CV) was performed on tamoxifen (tam) using different electrodes and in various acidic electrolytes containing 10% v v−1 methanol (MeOH). Tam oxidation was found to be most favorable using 0.1 mol L−1 H2SO4. To investigate the mechanism, we performed chronoamperometry, CV at different scan rates, differential pulse anodic voltammetry (DPAV), and electrochemical impedance spectroscopy on tam-covered glassy carbon electrodes (GCEs). The electrode area, diffusion coefficient, and surface concentration (Γ) of tam were calculated to be 0.062 cm2, 3.65 × 10−6 cm2 s−1 , and 3.

19p tudichquannguyet 29-11-2021 9 0   Download

Disposal of contaminated wastewater causes many serious problems especially when it gets mixed with the ground and seawater. It is, therefore, important to apply any remedial action to eradicate dangerous pollutants from the aqueous effluents and to avoid exposure of this wastewater to aquatic life. The research results discussed herein deal with the removal of Rhodamine B (RhB) and Congo Red (CR) dye from wastewater by using multi-walled carbon nanotubes (MWCNTs) as an adsorbent.

17p tudichquannguyet 29-11-2021 7 0   Download

The occurrence of pesticides even at low concentrations in drinking water sources might induce potential risks to public health. This study aimed to investigate the removal mechanisms of eight pesticides by the nitrifying expanded-bed filter using biological activated carbon media at the pretreatment of a drinking water plant.

13p chauchaungayxua12 09-07-2021 11 1   Download

Pyropia yezoensis (Rhodophyta) is widely cultivated in East Asia and plays important economic, ecological and research roles. Although inorganic carbon utilization of P. yezoensis has been investigated from a physiological aspect, the carbon concentration mechanism (CCM) of P. yezoensis remains unclear.

12p vijichea2711 28-05-2021 9 1   Download

One of the largest sinks of organic carbon on the global scale is the organic matter stored in soils, it contains about 1500 Gt C in the top one meter. Changes in the size and the turnover rate of the soil carbon pools could possibly have an effect on the atmospheric CO2 concentration and the global climate. Stabilization of soil organic C (SOC) is pre-requisite for long-term C sequestration to mitigate climate change. Stabilization of SOC means the decrease in the potential loss of organic C by microbial respiration, erosion or leaching.

11p cothumenhmong7 09-09-2020 22 1   Download

Phosphorous is one of the most abundant metallic element found in the earth’s crust and present in soils in both organic and inorganic forms. Though it is present in high concentration, only 0.1% of the total P is available to plant because of poor solubility and its fixation in soil with other metallic elements in the soil such as Ca, Al, Fe to form calcium phosphate, aluminum phosphate and ferrous phosphate and thus becomes unavailable to plants.

9p nguaconbaynhay6 23-06-2020 12 1   Download

The calcium looping process, based on the reversible reaction between CaCO3 and CaO, is recently attracting a great deal of interest as a promising thermochemical energy storage system to be integrated in Concentrated Solar Power plants (CaL-CSP). The main drawbacks of the system are the incomplete conversion of CaO and its sintering-induced deactivation. In this work, the influence of particle size in these deactivation mechanisms has been assessed by performing experimental multicycle tests using standard limestone particles of well-defined and narrow particle size distributions.

10p partimesinhvien 08-05-2020 17 1   Download

Investigating microbial metabolic characteristics and soil organic carbon (SOC) within aggregates and their relationships under conservation tillage may be useful in revealing the mechanism of SOC sequestration in conservation tillage systems. Crop residue retention has been considered a practicable strategy to improve soil organic carbon (SOC) but the effectiveness of residue retention might be different under varied tillage practices.

16p caygaocaolon2 11-03-2020 21 0   Download

The C4 photosynthetic carbon cycle can be explained as the elaborated addition to the C3 photosynthetic pathway. It is a unique series of biochemical, anatomical and regulatory gene characteristics that concentrate CO2around the carboxylating enzyme Rubisco, thereby increasing photosynthetic efficiency during high rates of photorespiration. The C4 photosynthetic pathway has evolved as an adaptation to high light intensities, high temperatures and dryness, therefore in the warmer climates of the tropical and subtropical dominating the grassland floras and biomass production.

15p nguaconbaynhay3 07-02-2020 16 0   Download

Individual and competitive adsorption studies were carried out to investigate the removal of phenol and nickel ions by adsorption onto multiwalled carbon nanotubes (MWCNTs). The carbon nanotubes were characterized by different techniques such as X-ray diffraction, scanning electron microscopy, thermal analysis and Fourier transformation infrared spectroscopy. The different experimental conditions affecting the adsorption process were investigated. Kinetics and equilibrium models were tested for fitting the adsorption experimental data.

11p trinhthamhodang1 16-11-2019 10 0   Download

Due to its unique thermal properties, carbon nanotubes (CNTs) have been used as additives in order to increase thermal conductivity and other mechanical properties of nanofluids. There have been many studies of thermal conductivity for single phase fluids containing CNTs; however, most commercial coolants are two-phase fluids, such as the mixture of ethylene glycol and water (E/W). Similarly, there are some models that can be used to predict thermal conductivity of single phase fluids containing CNTs but not yet as a model for thermal conductivity of the E/W solution containing CNTs.

4p caygaocaolon1 13-11-2019 8 0   Download

In this research, ethylene–propylene–diene (EPDM) rubber, a type of synthetic rubber with excellent anti–vibration and anti–noise properties, was studied for the application in anti–vibration pads. Via changes in the concentration of substances in the mixtures such as carbon black, triethanolamine (TEA) and sulfur, the mechanical properties and the anti–vibration efficiency of the EPDM rubber samples were determined using mechanical tester.

7p cumeo3000 01-08-2018 30 4   Download

Drug resistance is the major obstacle to successful cancer treatment. To understand the mechanisms responsible for drug resistance in tongue can-cer, Tca8113 cells derived from moderately differentiated human tongue squamous cell carcinoma were exposed to stepwise escalated concentrations of pingyangmycin (PYM) to develop the resistant cell line called Tca8113⁄ PYM

13p viettel02 19-02-2013 34 2   Download

Source: HANDBOOK OF MECHANICAL ENGINEERING CALCULATIONS SECTION 18 ENVIRONMENTAL CONTROL AND ENERGY CONSERVATION ENVIRONMENTAL CONTAMINATION ANALYSIS AND PREVENTION 18.2 Recycle Profit Potentials in Municipal Wastes 18.2 Choice of Cleanup Technology for Contaminated Waste Sites 18.4 Cleaning Up a Contaminated Waste Site Via Bioremediation 18.10 Process and Effluent Treatment Plant Cost Estimates by Scale-Up Methods 18.16 Work Required to Clean Oil-Polluted Beaches 18.73 Sizing Explosion Vents for Industrial Structures 18.75 Industrial Building Ventilation for Environmental Safety 18.

164p medinova 26-10-2010 123 42   Download